Howard A. Hanson Dam Emergency Closure System Rehabilitation
LOCATION:
King County, Washington
CLIENT:
Project Details
BCI was the prime contractor for this project. The project at Howard Hanson Dam at Ravensdale WA consisted of fabrication and installation of a new hoist and new 45 Ton Emergency Roller Gate. Demo and removal of the existing hoist and gate also occurred.
BCI utilized ROVs, LIDAR, and bathymetric surveys to study the area near the dam
tower. We utilized a barge crane to rig and remove woody debris from a trashrack area, and removed a trashrack for repair. We replaced the old emergency roller gate and replaced in kind. We also replaced the old hoist with a modern one manufactured by Wemco, Inc. The hoist consisted of a new PLC, rolling floor, and design upgrades. Subcontractors used included Ballard Marine, TMF, Wemco, And Osprey Corrosion.